Enhancing Marine Durability with Low-Carbon Concrete at Port of Brisbane 

Project Overview 

The Port of Brisbane, Queensland’s largest multi-cargo port, required the replacement of a deteriorating suspended concrete slab at Wharf 5. Originally built with a high GP cement content, the structure had experienced premature degradation due to chloride-induced corrosion in the aggressive marine environment. 

Challenge 

To extend the life of the new slab, the project team needed a concrete solution that delivered improved durability, workability, and sustainability – even in adverse coastal conditions and under strict site logistics. 

Solution 

Hy-Tec Concrete collaborated with Mapei Australia to develop a tailored low-carbon concrete mix incorporating Mapecube 60W, an advanced strength-enhancing admixture. This admixture enabled: 

• Improved hydration and performance of SCMs (Supplementary Cementitious Materials) 

• Lower clinker content for reduced embodied carbon 

• Enhanced durability in harsh marine environments 

• Better workability during placement despite weather and wait times 

Outcome 

The mix design supported efficient onsite placement while delivering a high-strength, durable, and environmentally responsible solution. The project demonstrated how innovation in concrete mix technology can support infrastructure longevity and reduce environmental impact.